Double-coil inductor relay



Aug. 9, 1932; F, EAME 1,870,840

DOUBLE COIL INDUCTOR RELAY Filed June 18, 1929 HyZ.

Ll L2 INVENTOR W/W/am Ffqmes TORNEY Pei-tallied Aug. .9, 1932 UNITED STATES PATEN WILLIAHF. EAMES, F WIL KINSBUBG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA DOUBLE-COIL IN'DUCTOR art Application filed June 18,

My invention relates to elevators and paielevator shall be so constructed that variations in the supply-circuit voltage will not adversely affeet its operation.

In practicing my invention, I provide a plurality of magnetizable plural-part yokes,

each of substantially C-shape and each having a fixed and a movable coil operatively associated therewith. Contact members are operati'vely associated with each movable coil 1 to control. a circuit.

In the drawing;

Figure 1 is a top plan view of a relay embodying my invention.

:5 Fig. 2 is a view thereof, in front'elevation,

and v Fig 3 is a view, in vertical sectioii, taken :11 the line IIL-III of Fig. 1.

Fig. 4 is a diagram of connections of a which the inductor relay embodying my invention is to be used.

An inductor-relay structure 11 comprises a base plate 12 and an upright plate 13 which are preferably made of electric-insulating material and may be secured together in any suitable manner.

A pair of magnetizable yoke elements 14 and 16 are secured at the forward edge of 1D the base plate 12, as by screws or bolts 17.

Each of the members .14 and 16 is of substantially L-shape, and the horizontal portion thereof has a bifurcated end, substantially as shown in Fig. 1 of the drawing. Members 18 and 18, also of magnetizable material, cooperate with the members l l and 16, respectively, and have their forward ends also bifurcated while their rear ends are en larged and provided with substantially circular openings 19 and 19, into which the simplified form of elevator-control system in l AY 1929 Serial No. $71,754:.

upper ends of the vertical legs of members 14 and 16 respectively extend. The mem-' bers 18 and 18 are heldin proper operative positions by brackets 21 and 21, respectively, which are preferably made of non-magnetic material and are suitably bolted against the vertical plate 13.

Members 14 and 16, respectively, have coils 22 and 22' mounted thereon and secured thereto in such manner that they will not move relative to the vertical legs of these members.

Movable coils 23 and 23' are secured to opposite ends of an arm 24 in such positions as to extend into the openings 19 and 19, respectively. Arm 24 is pivotally mounted,

intermediate its ends, on a supporting bracket 1 25 also secured to the plate 13, in such position that the weights of coils 23 and 23 will be normally balanced. I

A suitable contact member 26 is attached to coil 23 by insulating washer 27 to col i operate with a fixed contact member 28, se-

contagt members 26' and 28 are disposed to cooperate with coil 23. The contact members 28 and 28 may be substantially rigid, and the contact members or arms 26 and 26 may be resilient, therelative location of these cooperating pairs of contact members or arms being such as to maintain the coils 23 and the arm 24 in balanced condition, substantialtact terminals 29 mounted on the plate 13.

Contact terminals 31 and 31' are'provided at the upper end of the plate 13 to which the contact members or arms 26 and 26' are respectively connected, as by wire shunts 32 and 32'.

An inductor relay of this kind is adapted cured to the upstanding plate 13. Similar] 7B for use in a control system of the kind which is disclosed and claimed in patent application Serial No. 731,921, filed August 14, 1924, by E. M. Bouton and assigned toWestinghouse Electric & Manufacturing Company.

weight CW secured to its other end. The

drum D is rotated by a motor Ell/l having an Fig. 4. of the drawing illustrates a simpli fied diagram of connections of a system of control embodying inductor relays of the character shown in the preceding figures.

Referring more particularly, therefore, to Fig. 4: of the drawing, an elevator car designated by G is to be moved upwardly and downwardly and is suspended by a cable CA. running over a drum D and having a counterarmature EM preferably directly secured to, or connected with, the drum.

Means for energizing the motor EM comrises an individual powerplant embodymg a motor Mhaving an armature M driving the armature G of a generator G. The generator G is also provided with a series field winding GSF and an auxiliary demag- 2 netizing field winding Gill wound in opposit-ion to winding GSF. The motor is provided with a shunt field winding MF, and the armatures M and connected to each other.

The generator G is provided also with a separately excited field winding G1? which is adapted to he selectivelyenergized to vary u the direction and value of the voltage output of the generator armature G, the terminals by an up-direction switch 1 and a downdirection switch 2 operable to determine the direction of voltage output of the generator G, and a speed relay 3 for controlling the value of the voltage output of the generator. Up-direction switch 1, down-direction switch 21 and speed relay 3 are, in turn, controlled by means of a car switch CS mounted upon the car for manipulation by an attendant.

For initiating deceleration and stopping of the car, as it approachesithe various doors which it serves, I have illustrated an up stopping inductor relay l0 and an up slowdown inductor relay 41 for initiating deceleration of the elevator and for stopping v515 the same, when the car successively passes inductorplate 41 cooperating with up slowdown relay 41 and another inductor plate 4.0. cooperating with up stopping inductor relay 40, as the car successively approaches each of the floors. In like manner, I have 66 downwardly.

provided a down slow down relay 42 and a down stopping inductor relay 43 cooperating with'inductor plates 42' and 43 as the car approaches the floor, when travelling may be mechanically inductor relay i0 representing the arms 1 1 and 18, coils 22 and 23 and in fact, all of the structure on one side of the pivotal suspension of the arm 2i, whereas the up slowdown relay 41 represents members 16 and 18', coils 22 and 23 and all of the structure located on the opposite side of the pivotal suspension of arm 24:. In like manner, the down slow-down inductor relay l2 and down stopping inductor relay 43, illustrated as separate relays, will, in fact, comprise portions of another relay unit, such as is illustrated inl igs. 1 to 3. I

llt will be observed that the two portions of relay structure 11, each constituting, in efiect, a single relay, are disposed in difterent vertical planes so that, by arranging inductor plates 10 and all for operating up slow-down inductor relay -1 and up stopping inductoi relay 40 in corresponding different vertical planes, the forked ends of the members 18 and 18, respectively, may be brought into operative relation tothe corre sponding inductor plates ll and t0 without the possibility of the slow-down inductor plate operating the stopping relay and vice versa.

Let it be assumed that the operator wishes to cause the car to ascend. He will operate the lever ot the car switch CS to the right so that the arcuate segment 44 thereof will engagecontact members if) and i6. This will establish a circuit which may be traced as follows: from supply-circuit conductor L1, shown at the left-hand side of Fig. 4 of the drawing, through conductors 42' and 48, to the contact members 49 controlled by the stop inductor relay 40 (which may be contact members 26 and 28 of a relay 11, as shown in Figs. 1, 2 and-3), through conductor 50, the oil of up-direction switch 1, conductor 51,.contact members i6, 44 and 45 of car switch CS and, through conductor 52 and 60 to supply-circuit conductor L2.

This energizes the coil of up-direction switch 1 which operatesto cause certain of W the contact members thereof to be brought into operative engagement with each other. Acircui't through the field winding GF is enthrough conductors 47, 53 and 54, the contact members b on up-direction switch 1. conductors 55 and 56, field winding GF, conductors 57 and 58, contact members 0 on ergized as follows: from conductor L1- by generated in the armature G and supplied to'the armature EM which will, therefore, rotate in a predetermined direction at a predetermined speed.- In this case, the direction is such as to cause thecar C to move upwardly.

Up direction switch 1 when energized,

completes a holding circuitfor the coil of this switch which extends from supply-circuit conductor-L1,-through conductors 47 and 48, contact members 49 of stopping inductor relay 40, conductor 50, coil of updirection switch 1, conductor 51, contact members a on ,up-direction switch 1 and conductor 62, to supply conductor L2.

If the operator desires to cause the car to move at a higher speed, he moves the car switch CS further to the right so that the conducting segment 44 thereof will engage contact members 45 and 62. A circuit for speed relay 3 is thereby established zwhich extends from conductor L1, throiigh conductors 47 and 64, the contact members 65 of down slow-down inductor relay 42, conductor 66, the contact members 67 of up slowdown inductor-relay 41, and conductor 68, to the coil of speed relay 3, through conductor 69, contact members 62, 44 and 45 of car switches and conductors 52 and 60, to supply conductor L2. Speed relayfi, when energized, short-circuits resistance B through conductors 70 and 71 and contactmembers h on relay 3, to thereby cause the car to travel at high speed. I

Speed "relay 3, when energized, also com 1 pletes a self-holding circuit which extends from line conductor L1, through conductors 47 and 64, contact members 65 of down slowdown inductor relay 42, conductor 66, the contact members 67 of up slow-down inductor relay 41, conductor 68, the coilof relay 8, conductors 69 and 73. contact members a of speed relay 3 and conductors 74 and supply conductor L2.

lit the operator desires to cause the car to stop at a predetermined door, he will move the car switch to its substantially central position, as shown in Fig. 4 of the drawing,

whereby an energizing circuit for the coils of relays and 41 is established which extends from line conductor L1, throughconductor 47, to a junction point 7 5, where onebranch extends through conductor 7 6, the two coils of inductor relay 41, in series relation, to a junction point 77 on conductor 78, while the other branch extends from junction point 7 5, through conductors 64 and 79, the two coils of relay 40 and conductor 78, to junction point 77 whence the reunited circuit extends,

by way of conductor 80, to the contact members e on lip-direction switch 1, conductors 81 and 82, contactvmembers 83, 44 and of car switch CS and conductors 52 and to line conductor be observed that energization of the coils 22' and 23 of the' relay 41 will cause amagnetic flux to flow from coil 22, through the leg 16 of the core, the air gap between leg 16 and member '18 and coil 23', to the upstanding portion of core member 16. At the same time, a magnetic flux,;produced by coil22, embraces the horizontal leg of core member 14, the air gap betweencore 14 and member 18, coil 23 and back to coil 22. 1 V

It will, therefore, be apparent that the pull on coils 23 and 23' will balance each other, and the arm 24 will not be moved. However, as car C approaches the floor at which it is desired to stop, an up slow-down inductor plate 41' enters the forked ends of members 16 and 18' and thereby reduces the reluctance of the magnetic path for-coils 22 and 23", since the flux now passes through a small air gap from member 16' to the inductor plate 41' and through another small air gap to member 18 while the magnetic circuit for coils 22 and 23 will not be changed. Hence, the increased pull on coil 23 overbalances that of coil 23'and coil 23 will be moved downwardly, thereby separating contact members holding circuit for speed relay 3 to thereby initiate deceleration of the car by reinserting resistor R in the circuit for generator field winding Gil.

In like manner, when theinductor plate 7 40 comes into operative relation to the inductor relay 40, the holding circuit hereinbegtore described for the coil of up-direction switch 1 is interrupted, so that the energization of field winding G'Fis interrupted and the elevator motor is deenergized.

Means for quickly stopping the motor is provided tdinclude normally-closed contact members d on direction switches 1 and 2-, closing a circuit which may he traced as r01- lows: from one terminal of the armature G, through conductor 84, contact members at on down'direction switch 2, conductor 85, contact members a? on up-direction switch 1., conductor 86, held winding GAE and conductor 87'and field winding Gsllto theother terminal of armature G. Any current produced by generator G will, therefore, flow through the field winding GAlF, creating a flux opposing that which caused the current, and the generator voltage will be reduced to zero.

When the operator desires to have the car move downwardly, he moves the handle of lllll ire v the car switch GS to the left, and the same L d nevueeo lt is, therefore, considered unnecessary to open-circuit magnetic yoke, an energizablo describe all of these circuits in detail. pivotally mounted coil and an energizable The inductor-relay structure embodying fixed coil on said yoke, a normally closed my invention thus provides a relatively si switch resiliently supported on the plvotally I ple double-inductor relay embodying a minmounted coil and an inductor plate movable, imum number of parts which cooperate for relatively to the yoke to complete the mag the desired purpose, in the manner hereinnetic circuit thereof to efiect movement of the before set forth. lt is obvious that, as the pivotally mounted coil and of the switch contact arms 26, insulatedly mounted on the 5. An inductor relay including a plurality balanced lever arm will permit oi the of normally open-circuit magnetic yokes looperation hereinbetore set forth, the contact cated in spaced relation to each other, a stamembers 2b and 28 the oneend of the arm tionary energizable coil on each yoke, a mov= remain closed when that end of the arm moves able energizable coil operatively associated upwardly, while the contactmembers 26 and with each yoke, means pivotally supporting 28 on he o h n o the arm will be dis said movable coils in balanced relation, cirengaged as that end moves downwardly wit-controlling switches operatively asso- Slight nus-alignment of the inductor plates ciated with each movable coil, and a plurality all and ll relative to the forked ends of of inductor plates movable relatively to the the arms ll, 16 and lb Will no a c h yokes to selectively effect the closing the 2@ operation of the relays for the reason that any magnetic circuit of a yok th ov nt; f all increase in the length of air gap on one side a iv t lly u t d il, a d th o ation will be compensated for by the decrease in f wit h, length of the air gap on the other side s 6. An inductor relay including a plurality that the total reluctance of the magnetic cirvof o ll Qpen cipcuifimggnefijfi bk 1 cuit will not be varied appreciably. cated in spaced. relation to each other, a stali i al o viden th t, as h wo oil Z3 tionary energizable coil on each yoke, a movand 23 re o al y ba an d, a y a a y able energizabie coil operatively associated in the voltage of the supply circuit energ'zith h yoke, means mn supporting ing the inductorrelay coils will not adverseaid movable oil in balanced relation, a

ill

so 3' afiecl the operation ofthe moving parts plurality of circuit-controlling switches each @155 65 '4. An inductor relay including a normally a switc operable by movement of said mov- 130 of these relays tor the reason that any varialindividually operable by movement of a cor tion in the voltage affects both sets of coils responding movable coil, and a plurality of simultaneously. inductor plates movable relatively to the sev- Various modifications may be made in the oral yokes to eflect selective closing of the device embodying my invention withoutdemagnetic circuit of a yoke, the movement of 1m parting from the spirit and scope thereof and a pivotally mounted coil and the operation Iclesire, therefore, that only such limitations or a cooperating switch. shall be placed thereon as are imposed by the 7. An inductor relay including a pair 0t prior art or are set forthin the appended spaced magnetic yokes, each of substantially 40 claims. U-shape, a stationary energizable coil on the Iclaim as my invention: intermediate portion of each yoke, a mov- 1. An inductor-relay structure cooperatable energizable coil adjacent each stationary ing with an inductor plate including a magcoil, meaiis for pivotally supporting said pair netic yoke, a plurality of relatively movable of movable coils in balanced relation, a switch coils opcratively associated with said yoke for each of said movable coils operable by no vand normally energized and a switch acmovement thereof, and a plurality of inductuated by the relative movement of said coils. tor plates movable relatively to the several 2. An inductor-relay structure including a yokes to efi'ect selective closing of the magnormally open-circuit magnetic yoke, a pivnetic circuit of a yoke, the movement of the otally mounted energizable coil and a fixed movable coil associated therewith; and the energizable coil on said yoke, a switch disoperation of the associated switchi posed for actuation by the pivotally mount- 8. In an inductor-relay, a normally opened coil, and an inductor plate movablerelacircuit magnetic yoke, a plurality of energiztively to the yoke. to complete the magnetic able relatively movable coils'associated with circuit thereof; said yoke, a switch operableby relative move- 190 3. An inductor relay including a normally ment of said-coils. and an inductor late relaopen-circuit magnetic yoke, a normally ent-ively movable with respect to said yoke for ergized pivotally mounted coil and a norcompleting the magnetic circuit thereof, for mally energized fixed coil on said yoke, a efl'ecting the relative movement of said coils,

a0 normally closed switch disposed for actuaand for effecting the operation of said switch. tion by the pivotally mounted coil, and an 9. In an inductor-relay, a normally openinductor plate movable relatively to the yoke circuit magnetic yoke, a stationary energizto complete the magnetic circuit thereof to able coil on said yoke, a movableenergizable effect an opening movement of theswitch. "coil osed adjacent to said stationary coil,

able coil, and an inductor plate movable relatively to the yoke for completing the magnetic circuit thereof, for effecting movement of the movable coil, and for efiecting the operation of said switch. 4

In testimony whereof, I have hereunto subscribed my name this 14th day of June, 1929.

WILLIAM F. Ems. 

